Não informado. (1974). History and social science teacher. Ontario History and Social Science Teachers Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. History and Social Science Teacher. Toronto, Canada: Ontario History and Social Science Teachers Association, 1974.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. History and Social Science Teacher. Ontario History and Social Science Teachers Association, 1974.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.